propsys: Allow only ASCII digits in PSPropertyKeyFromString.

dlls/propsys/propsys_main.c

@@ -495,7 +495,7 @@ HRESULT WINAPI PSPropertyKeyFromString(LPCWSTR pszString, PROPERTYKEY *pkey)
     }
 
     /* Overflow is not checked. */
-    while (iswdigit(*pszString))
+    while ('0' <= *pszString && *pszString <= '9')
     {
         pkey->pid *= 10;
         pkey->pid += (*pszString - '0');

dlls/propsys/tests/propsys.c

@@ -346,6 +346,9 @@ static void test_PSPropertyKeyFromString(void)
     static const WCHAR fmtid_normalpidW[] = {'{','1','2','3','4','5','6','7','8','-','1','2','3','4','-',
                                              '1','2','3','4','-','1','2','3','4','-',
                                              '1','2','3','4','5','6','7','8','9','0','1','2','}',' ','1','3','5','7','9',0};
+    static const WCHAR fmtid_udigitW[] = {'{','1','2','3','4','5','6','7','8','-','1','2','3','4','-',
+                                          '1','2','3','4','-','1','2','3','4','-',
+                                          '1','2','3','4','5','6','7','8','9','0','1','2','}',' ','1','2','3',0x661,'5','7','9',0};
     PROPERTYKEY out_init = {GUID_MEMBERS(dummy_guid), 0xdeadbeef};
     PROPERTYKEY out;
     HRESULT ret;
@@ -422,6 +425,7 @@ static void test_PSPropertyKeyFromString(void)
         {fmtid_commanegspcpidW, &out, S_OK, {GUID_MEMBERS(expect_guid), 0U}},
         {fmtid_negcommapidW, &out, S_OK, {GUID_MEMBERS(expect_guid), 0}},
         {fmtid_normalpidW, &out, S_OK, {GUID_MEMBERS(expect_guid), 13579}},
+        {fmtid_udigitW, &out, S_OK, {GUID_MEMBERS(expect_guid), 123}},
     };
 
     int i;